Conair® manufactures its hair dryers with two different kinds of safety plugs. The ALCI is known as an Appliance Leakage Current Interrupter. This unit has the Reset button and the Test button. The circuit is looking for leakage of current between the two conductors. This unit sometimes trips when lights are turned on and off, when the dryer is plugged in, or when a new dryer is taken out of the box and plugged in by the consumer who doesn’t know how to operate the Reset feature. An IDCI refers to Immersion Detector Current Interrupter. This unit trips only when the dryer has been immersed in water. The dryer should never be used again after immersion because of the potential dangers a water-damaged unit presents to consumers. That is why this unit trips once and is not resettable - because it shouldn’t be used again! Both safety plugs look a little different but they provide the same function - they protect the consumer from electric shock.